San Marino competed at the 2019 World Aquatics Championships in Gwangju, South Korea from 12 to 28 July.
Artistic swimming
San Marino entered two artistic swimmers.
Women AthleteEventPreliminariesFinalPointsRankPointsRankJasmine ZonziniSolo technical routine73.814219did not advanceSolo free routine76.233321did not advanceJasmine VerbenaJasmine ZonziniDuet technical routine74.317833did not advanceDuet free routine76.700026did not advance Swimming
San Marino entered two swimmers.
Men AthleteEventHeatSemifinalFinalTimeRankTimeRankTimeRankGiacomo Casadei50 m breaststroke30.13=58did not advance100 m breaststroke1:05.9669did not advance
Women AthleteEventHeatFinalTimeRankTimeRankArianna Valloni800 m freestyle8:52.8529did not advance1500 m freestyle16:56.9824did not advance
References